<template>
  <p>App</p>
  <A :count="count" @update="count++" />
</template>

<script lang="ts">
import A from "./A.vue";

export default {
  name: "App",
  components: {
    A,
  },
  data() {
    return {
      count: 0,
    };
  },
};
</script>
